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earth

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  1. M

    Fused Spur 190v between Earth and Neutral ??

    Hiya Guys, I have a gas central heating boiler that is not switching on at all. It's connected to a clock timer and then to a fused spur. Boiler technician was out today to say the boiler is fine and I need an electrician, hence this post ! He said we have cross polarity on the fused spur. He...
  2. D

    Comical vid from Efix about ground installation earth foundation bonding and earthling

    I wish all updates could be done like this :)
  3. M

    Flex connector - no earth on lights

    I have a cable twin + earth coming from wall switch with 3 amp fuse - I want to connect it to some LED lights with a flex connector. LEDs have no earth, so what do I do with the earth wire coming from switch to flex connector? Thanks
  4. cliffed

    Main earth bonding protective conductors

    EICR recently done, Swa sub mains armouring used for cpc & MEBPC. Installed 40 years ago, water/gas/structural bonding required, these are @ 10mm Tncs earthing system @ origin which is remote from buildings 120mm tails. The sub mains vary in sizes from 25mm to 50mm….what’s your thinking on...
  5. D

    grommets and earth Sleeving are so over rated

    if you are going to put a 'how to' vid on youtube atleast buy a dang grommet and some G/y sleeve
  6. R

    Neutral to earth fault affecting both RCDs

    Hello everyone, I'm newly registered having read the boards from the shadows for a while. I have a question about neutral to earth faults and RCDs. I have read around this as much as I can but being relatively newly qualified my experience isn't as much as the collective members here so I...
  7. J

    UK Spur off a 4mm twin and earth, 32amp radial

    I have a dedicated radial from the consumer unit to my conservatory. This was installed using 4mm twin and earth as it gives the option to use multiple electric heaters on a 32amp breaker if needed. The circuit consists 4 double sockets plus one single socket on the end, in a weatherproofed...
  8. C

    Earth Leakage Clamp Meter

    Hi everyone, Any suggestion for an Earth Leakage Clamp Meter within a reasonable price?
  9. R

    UK Unknown earth

    Can anyone tell me what the requirements are regarding visual inspections on earth sources, ie rods/conductive concrete etc? The scenario Ive got is that the original earth was a rod however it appears as if conductive concrete was installed subsequently but theres no documentation to support...
  10. F

    UK Wiring up an immersion heater to a smart switch - what do I do with the earth wires?

    Having just replaced an immersion element with its life expired cable and switch, I'm thinking of replacing the switch (20A double pole) with a smart version so that I can control the hot water from my phone etc. Both the immersion heater and the current switch have earth terminals, however the...
  11. W

    RCCB tripped when neutral - earth touching

    When replacing a light housing, I found the RCCB was somehow tripped. I first used a pen tester to check the wires and found them normal (no voltage). I then used a multimeter to test again. Here are the results: L-N 7.4 v L-E 6.8 v N-E 3 V After the RCCB was tripped, the readings were zero...
  12. E

    Where's the earth go?

    Earth has been snipped off, obviously. I thought that earth wasn't required since the connections appear to be in some sort of maintenance free box, but is this right? If not, i can't see anywhere the earth could go. EDIT just clocked the double insulated symbol, so i'm presuming that even...
  13. J

    UK Earth loop fault impedance help

    Hello I’m a student learning about industrial wiring and circuits and we’re about to start learning about how to do loop impedance calculations. I have made a drawing of a three phase installation and was wondering if anyone could give me information on how I get the Ze Zs and R1 + R2. How would...
  14. Algarve Sparky

    Off grid solar and earth return

    So despite living working in a country blessed with 300 days of sunshine I have not got my head around this solar thing, there is very few companies here who know what they are doing and buy off the shelf kits and rarely do they perform as sold and in many cases unregistered ones actually...
  15. S

    Earth leakage

    We have measured 50mA earth leakage from an oven.but during we touch the metal surface we do not receive shock :D how?
  16. J

    Earth leakage

    Is there any guides on how much earth leakage is acceptable in an industrial setting ie MCC. The reason i ask is it seems to be most sites have a degree of leakage which I’m not sure is due to many VSDs being used but recently a panel I saw had 0.6amps leakage but the motor starter was all good...
  17. D

    Replacing no earth spotlights with earth spotlights

    warning! im a DIYer, so don't know alot about electrics! The current spotlights have a driver and no earth, they're connected to their driver with a 2 wire clip connector. The driver is then connected to the mains wires with a 3 pin clip connector. The replacements are mains voltage (astro...
  18. D

    Metal boxes NO earth lug...

    So, my brother just moved into a 1980s built semi and some of the dimmers werent working and some other stuff needed replacing like cracked sockets. He wanted brushed chrome so being a fairly new build I though easy no problem... Just dropped down a few of the dimmers , one of them being an...
  19. D

    Earth Bonding

    Hi all, My first post-don't be too hard on me! I'm bonding an existing 3-phase power supply (150mm2 SWA cable) to various incoming services: Sprinkler main, water, compressed air, gas steam & condensate etc. According to BS7671, I can run 35mm2 wire. The run to first service from main earth...
  20. C

    Switching sockets and lights from plastic to metal, earth wire query.

    Hi all, hoping everyone has enjoyed their bank holiday weekend. I hope this post goes in the right place as I've just joined. I'm looking to swap a two way light switch and two double plug sockets from bog standard plastic ones to stainless steel ones, the existing wiring (old colours) has an...

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